in there. so the important part of that question was why are we here in san francisco. and we're here in san francisco because san francisco is one of the most innovative cities in the galaxy, and it's a very great place to be the home of the challenge america summit, the first-ever challenge america summit. so it's now my job to introduce our first speaker of the night, who is going to officially kick off the first-ever challenge america summit, somebody who has been verylfe instrumental in creating a movement around innovation in san francisco. just a few months ago, announced october as innovation month inla whole lot of work on, you know, creating a@g real ecosystem for entrepreneurs, for governments, for everybody to create new ideas and new innovations. please join me in welcoming mayor ed lee to the floor. >> [applause.] >> thank you. thank you, josh. welcome, everybody. now that i know where i'm at, i want to welcome all of you, i want to of course thank the night challenge -- night rover challenge, nasa, of course, for being here. i also want to thank s.p.u.r. again for hosti